| Value | Category | Cases | |
|---|---|---|---|
| 1970 | 1 |
1.1%
|
|
| 1972 | 1 |
1.1%
|
|
| 1974 | 1 |
1.1%
|
|
| 1976 | 1 |
1.1%
|
|
| 1977 | 1 |
1.1%
|
|
| 1979 | 1 |
1.1%
|
|
| 1981 | 3 |
3.4%
|
|
| 1983 | 1 |
1.1%
|
|
| 1985 | 2 |
2.3%
|
|
| 1986 | 3 |
3.4%
|
|
| 1988 | 2 |
2.3%
|
|
| 1990 | 2 |
2.3%
|
|
| 1991 | 1 |
1.1%
|
|
| 1992 | 2 |
2.3%
|
|
| 1995 | 2 |
2.3%
|
|
| 1996 | 2 |
2.3%
|
|
| 1997 | 2 |
2.3%
|
|
| 1998 | 1 |
1.1%
|
|
| 2001 | 1 |
1.1%
|
|
| 2002 | 4 |
4.5%
|
|
| 2003 | 2 |
2.3%
|
|
| 2007 | 1 |
1.1%
|
|
| 2008 | 1 |
1.1%
|
|
| 2009 | 1 |
1.1%
|
|
| 3333 | Missing | 0 |
0%
|
| 5555 | Not Applicable | 0 |
0%
|
| 8888 | Refused | 0 |
0%
|
| 9999 | Don't know | 49 |
55.7%
|
| Sysmiss | 26716 |